Re: electric eye

The electric eyes in your garage door opener senses a break in an infrared ray. To build such a system will require a good knowledge of electronic. Have you talked to your doctor if he has another alternative? It is recommended that all doors and windows be locked to avoid a sleepwalking child from leaving the confines of your home. Replace deadbolts with knobs with one with a key, and hide the keys at night. To design and build a system that will alert you only when your son sleepwalks, you will have to place your son in a room by himself. I am sorry I can't provide you with an easy and practical solution. Even if you can have a light comes on in your room when he sleepwalks, how do you kwow that the light will wake you up all the times? I think I am more likely to respond to an audible signal than a light coming on when I am asleep. Good luck.